Errors

Errors share one shape: {"error": {"type", "code", "message", "param"}}. A decided request is never an error, whatever its verdict.

Status	Codes	Meaning
400	`invalid_json`	The body is not a JSON object.
401	`missing_api_key`, `invalid_api_key`	No key, or a revoked or expired one.
413	`body_too_large`	The body exceeds the limit.
415	`unsupported_media_type`	Send `Content-Type: application/json`.
422	`schema_violation`, `unknown_decision`	The request does not match its decision's schema; `param` names the field.
429	`rate_limited`, `daily_decision_quota`, `daily_question_quota`	Wait for `Retry-After`.
503	`service_unavailable`, `overloaded`	Retry shortly.